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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 980 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.27² =
  2. 2.24² =
  3. 3.26² =
  4. 4.17² =
  5. 5.22² =
  6. 6.19² =
  7. 7.29² =
  8. 8.13² =
  9. 9.23² =
  10. 10.14² =
  11. 11.18² =
  12. 12.11² =
  13. 13.12² =
  14. 14.25² =
  15. 15.28² =
  16. 16.16² =
  17. 17.21² =
  18. 18.15² =
  19. 19.23² =
  20. 20.14² =
  21. 21.24² =
  22. 22.23² =
  23. 23.21² =
  24. 24.22² =
  25. 25.21² =
  26. 26.14² =
  27. 27.11² =
  28. 28.25² =
  29. 29.13² =
  30. 30.15² =
  31. 31.16² =
  32. 32.25² =
  33. 33.12² =
  34. 34.28² =
  35. 35.28² =
  36. 36.25² =
  37. 37.12² =
  38. 38.23² =
  39. 39.17² =
  40. 40.17² =

Answer key

  1. 729
  2. 576
  3. 676
  4. 289
  5. 484
  6. 361
  7. 841
  8. 169
  9. 529
  10. 196
  11. 324
  12. 121
  13. 144
  14. 625
  15. 784
  16. 256
  17. 441
  18. 225
  19. 529
  20. 196
  21. 576
  22. 529
  23. 441
  24. 484
  25. 441
  26. 196
  27. 121
  28. 625
  29. 169
  30. 225
  31. 256
  32. 625
  33. 144
  34. 784
  35. 784
  36. 625
  37. 144
  38. 529
  39. 289
  40. 289

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